This investigation demonstrates that a series of biphenylenes can be easily prepared from their corresponding halobiphenyls by the cyclization of in situ generated 2',3'-didehydro-2-lithiobiphenyls at low temperature. Two remarkable advantages of this synthetic method include 1) the lack of any need for transition-metal catalysts or reagents in the cyclization, and 2) the ability to obtain C1-functionalized products by treating the reaction intermediate 1-lithiobiphenylene with an electrophilic reagent. π-Extended derivatives, such as benzobiphenylenes, dibenzobiphenylene, linear/angular [3]phenylenes, and biphenyleno[2,3-b]biphenylenes, were synthesized similarly using suitable biaryls or teraryls.
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2D biphenylene: exciting properties, synthesis & applications.
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Article Synopsis
- The synthesis of biphenylene, which combines various carbon ring structures, has advanced 2D materials research, focusing on a new material called biphenylene-like indium nitride (BPN-InN).
- BPN-InN displays a direct band gap energy of 2.02 eV, making it a strong candidate for use in optoelectronic devices.
- Mechanical tests showed that BPN-InN's properties, such as Young's modulus and band gap energy, changed under different strains, highlighting its potential for further exploration in semiconductor applications.
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